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OpenSpace/modules/base/rendering/renderableplanet.cpp

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/*****************************************************************************************
* *
* OpenSpace *
* *
* Copyright (c) 2014-2016 *
* *
* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
* software and associated documentation files (the "Software"), to deal in the Software *
* without restriction, including without limitation the rights to use, copy, modify, *
* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
* permit persons to whom the Software is furnished to do so, subject to the following *
* conditions: *
* *
* The above copyright notice and this permission notice shall be included in all copies *
* or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
****************************************************************************************/
// open space includes
#include <modules/base/rendering/renderableplanet.h>
#include <openspace/engine/configurationmanager.h>
#include <openspace/engine/openspaceengine.h>
#include <openspace/rendering/renderengine.h>
#include <modules/base/rendering/planetgeometry.h>
#include <openspace/util/time.h>
#include <openspace/util/spicemanager.h>
#include <openspace/scene/scenegraphnode.h>
#include <ghoul/filesystem/filesystem.h>
#include <ghoul/misc/assert.h>
#include <ghoul/io/texture/texturereader.h>
#include <ghoul/opengl/programobject.h>
#include <ghoul/opengl/texture.h>
#include <ghoul/opengl/textureunit.h>
#include <memory>
#include <fstream>
#define _USE_MATH_DEFINES
#include <math.h>
namespace {
const std::string _loggerCat = "RenderablePlanet";
const std::string keyFrame = "Frame";
const std::string keyGeometry = "Geometry";
const std::string keyRadius = "Radius";
const std::string keyShading = "PerformShading";
const std::string keyShadowGroup = "Shadow_Group";
const std::string keyShadowSource = "Source";
const std::string keyShadowCaster = "Caster";
const std::string keyAtmosphere = "Atmosphere";
const std::string keyAtmosphereRadius = "AtmoshereRadius";
const std::string keyPlanetRadius = "PlanetRadius";
const std::string keyAverageGroundReflectance = "PlanetAverageGroundReflectance";
const std::string keyRayleigh = "Rayleigh";
const std::string keyRayleighHeightScale = "H_R";
const std::string keyMie = "Mie";
const std::string keyMieHeightScale = "H_M";
const std::string keyMiePhaseConstant = "G";
const std::string keyBody = "Body";
}
namespace openspace {
RenderablePlanet::RenderablePlanet(const ghoul::Dictionary& dictionary)
: Renderable(dictionary)
, _colorTexturePath("colorTexture", "Color Texture")
, _nightTexturePath("nightTexture", "Night Texture")
, _heightMapTexturePath("heightMap", "Heightmap Texture")
, _cloudsTexturePath("clouds", "Clouds Texture")
, _reflectanceTexturePath("reflectance", "Reflectance Texture")
, _heightExaggeration("heightExaggeration", "Height Exaggeration", 1.f, 0.f, 10.f)
, _programObject(nullptr)
, _transmittanceProgramObject(nullptr)
, _irradianceProgramObject(nullptr)
, _irradianceSupTermsProgramObject(nullptr)
, _inScatteringProgramObject(nullptr)
, _inScatteringSupTermsProgramObject(nullptr)
, _deltaEProgramObject(nullptr)
, _deltaSProgramObject(nullptr)
, _deltaSSupTermsProgramObject(nullptr)
, _deltaJProgramObject(nullptr)
, _atmosphereProgramObject(nullptr)
, _texture(nullptr)
, _nightTexture(nullptr)
, _reflectanceTexture(nullptr)
, _heightMapTexture(nullptr)
, _cloudsTexture(nullptr)
, _geometry(nullptr)
, _performShading("performShading", "Perform Shading", true)
, _rotation("rotation", "Rotation", 0, 0, 360)
, _alpha(1.f)
, _planetRadius(0.f)
, _transmittanceTableTexture(0)
, _irradianceTableTexture(0)
, _inScatteringTableTexture(0)
, _deltaETableTexture(0)
, _deltaSRayleighTableTexture(0)
, _deltaSMieTableTexture(0)
, _deltaJTableTexture(0)
, _dummyTexture(0)
, _dummy3DTexture(0)
, _atmosphereTexture(0)
, _atmosphereFBO(0)
, _atmosphereRenderVAO(0)
, _atmosphereRenderVBO(0)
, _atmosphereCalculated(false)
, _atmosphereEnabled(false)
, _atmosphereRadius(0.f)
, _atmospherePlanetRadius(0.f)
, _planetAverageGroundReflectance(0.f)
, _rayleighHeightScale(0.f)
, _mieHeightScale(0.f)
, _miePhaseConstant(0.f)
, _mieExtinctionCoeff(glm::vec3(0.f))
, _rayleighScatteringCoeff(glm::vec3(0.f))
, _mieScatteringCoeff(glm::vec3(0.f))
, _hasNightTexture(false)
, _hasHeightTexture(false)
, _hasReflectanceTexture(false)
, _hasCloudsTexture(false)
, _shadowEnabled(false)
{
std::string name;
bool success = dictionary.getValue(SceneGraphNode::KeyName, name);
ghoul_assert(success,
"RenderablePlanet need the '" << SceneGraphNode::KeyName<<"' be specified");
//std::string path;
//success = dictionary.getValue(constants::scenegraph::keyPathModule, path);
//ghoul_assert(success,
// "RenderablePlanet need the '"<<constants::scenegraph::keyPathModule<<"' be specified");
ghoul::Dictionary geometryDictionary;
success = dictionary.getValue(keyGeometry, geometryDictionary);
if (success) {
geometryDictionary.setValue(SceneGraphNode::KeyName, name);
//geometryDictionary.setValue(constants::scenegraph::keyPathModule, path);
_geometry = planetgeometry::PlanetGeometry::createFromDictionary(geometryDictionary);
glm::vec2 planetRadiusVec;
success = geometryDictionary.getValue(keyRadius, planetRadiusVec);
if (success)
_planetRadius = planetRadiusVec[0] * glm::pow(10, planetRadiusVec[1]);
else
LWARNING("No Radius value expecified for " << name << " planet.");
}
dictionary.getValue(keyFrame, _frame);
dictionary.getValue(keyBody, _target);
if (_target != "")
setBody(_target);
// TODO: textures need to be replaced by a good system similar to the geometry as soon
// as the requirements are fixed (ab)
std::string texturePath = "";
success = dictionary.getValue("Textures.Color", texturePath);
if (success)
_colorTexturePath = absPath(texturePath);
std::string nightTexturePath = "";
dictionary.getValue("Textures.Night", nightTexturePath);
if (nightTexturePath != ""){
_hasNightTexture = true;
_nightTexturePath = absPath(nightTexturePath);
}
std::string reflectanceTexturePath = "";
dictionary.getValue("Textures.Reflectance", reflectanceTexturePath);
if (reflectanceTexturePath != "") {
_hasReflectanceTexture = true;
_reflectanceTexturePath = absPath(reflectanceTexturePath);
}
std::string heightMapTexturePath = "";
dictionary.getValue("Textures.Height", heightMapTexturePath);
if (heightMapTexturePath != "") {
_hasHeightTexture = true;
_heightMapTexturePath = absPath(heightMapTexturePath);
}
std::string cloudsTexturePath = "";
dictionary.getValue("Textures.Clouds", cloudsTexturePath);
if (cloudsTexturePath != "") {
_hasCloudsTexture = true;
_cloudsTexturePath = absPath(cloudsTexturePath);
}
addPropertySubOwner(_geometry);
addProperty(_colorTexturePath);
_colorTexturePath.onChange(std::bind(&RenderablePlanet::loadTexture, this));
addProperty(_nightTexturePath);
_nightTexturePath.onChange(std::bind(&RenderablePlanet::loadTexture, this));
addProperty(_heightMapTexturePath);
_heightMapTexturePath.onChange(std::bind(&RenderablePlanet::loadTexture, this));
addProperty(_reflectanceTexturePath);
_reflectanceTexturePath.onChange(std::bind(&RenderablePlanet::loadTexture, this));
addProperty(_cloudsTexturePath);
_cloudsTexturePath.onChange(std::bind(&RenderablePlanet::loadTexture, this));
addProperty(_heightExaggeration);
if (dictionary.hasKeyAndValue<bool>(keyShading)) {
bool shading;
dictionary.getValue(keyShading, shading);
_performShading = shading;
}
addProperty(_performShading);
// Mainly for debugging purposes @AA
addProperty(_rotation);
// Shadow data:
ghoul::Dictionary shadowDictionary;
success = dictionary.getValue(keyShadowGroup, shadowDictionary);
bool disableShadows = false;
if (success) {
std::vector< std::pair<std::string, float > > sourceArray;
unsigned int sourceCounter = 1;
while (success) {
std::string sourceName;
std::stringstream ss;
ss << keyShadowSource << sourceCounter << ".Name";
success = shadowDictionary.getValue(ss.str(), sourceName);
if (success) {
glm::vec2 sourceRadius;
ss.str(std::string());
ss << keyShadowSource << sourceCounter << ".Radius";
success = shadowDictionary.getValue(ss.str(), sourceRadius);
if (success) {
sourceArray.push_back(std::pair< std::string, float>(
sourceName, sourceRadius[0] * pow(10.f, sourceRadius[1])));
}
else {
LWARNING("No Radius value expecified for Shadow Source Name "
<< sourceName << " from " << name
<< " planet.\nDisabling shadows for this planet.");
disableShadows = true;
break;
}
}
sourceCounter++;
}
if (!disableShadows && !sourceArray.empty()) {
success = true;
std::vector< std::pair<std::string, float > > casterArray;
unsigned int casterCounter = 1;
while (success) {
std::string casterName;
std::stringstream ss;
ss << keyShadowCaster << casterCounter << ".Name";
success = shadowDictionary.getValue(ss.str(), casterName);
if (success) {
glm::vec2 casterRadius;
ss.str(std::string());
ss << keyShadowCaster << casterCounter << ".Radius";
success = shadowDictionary.getValue(ss.str(), casterRadius);
if (success) {
casterArray.push_back(std::pair< std::string, float>(
casterName, casterRadius[0] * pow(10.f, casterRadius[1])));
}
else {
LWARNING("No Radius value expecified for Shadow Caster Name "
<< casterName << " from " << name
<< " planet.\nDisabling shadows for this planet.");
disableShadows = true;
break;
}
}
casterCounter++;
}
if (!disableShadows && (!sourceArray.empty() && !casterArray.empty())) {
for (const auto & source : sourceArray)
for (const auto & caster : casterArray) {
ShadowConf sc;
sc.source = source;
sc.caster = caster;
_shadowConfArray.push_back(sc);
}
_shadowEnabled = true;
}
}
}
// Atmosphere data:
bool errorReadingAtmosphereData = false;
ghoul::Dictionary atmosphereDictionary;
success = dictionary.getValue(keyAtmosphere, atmosphereDictionary);
if (success) {
if (!atmosphereDictionary.getValue(keyAtmosphereRadius, _atmosphereRadius)) {
errorReadingAtmosphereData = true;
LWARNING("No Atmosphere Radius value expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
if (!atmosphereDictionary.getValue(keyPlanetRadius, _atmospherePlanetRadius)) {
errorReadingAtmosphereData = true;
LWARNING("No Planet Radius value expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
if (!atmosphereDictionary.getValue(keyAverageGroundReflectance, _planetAverageGroundReflectance)) {
errorReadingAtmosphereData = true;
LWARNING("No Average Atmosphere Ground Reflectance value expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
ghoul::Dictionary rayleighDictionary;
success = atmosphereDictionary.getValue(keyRayleigh, rayleighDictionary);
if (success) {
// Not using right now.
glm::vec3 rayleighWavelengths;
success = rayleighDictionary.getValue("Coefficients.Wavelengths", rayleighWavelengths);
if (!rayleighDictionary.getValue("Coefficients.Scattering", _rayleighScatteringCoeff)) {
errorReadingAtmosphereData = true;
LWARNING("No Rayleigh Scattering parameters expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
if (!rayleighDictionary.getValue(keyRayleighHeightScale, _rayleighHeightScale)) {
errorReadingAtmosphereData = true;
LWARNING("No Rayleigh Height Scale value expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
}
else {
errorReadingAtmosphereData = true;
LWARNING("No Rayleigh parameters expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
ghoul::Dictionary mieDictionary;
success = atmosphereDictionary.getValue(keyMie, mieDictionary);
if (success) {
if (!mieDictionary.getValue(keyMieHeightScale, _mieHeightScale)) {
errorReadingAtmosphereData = true;
LWARNING("No Mie Height Scale value expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
if (!mieDictionary.getValue("Coefficients.Scattering", _mieScatteringCoeff)) {
errorReadingAtmosphereData = true;
LWARNING("No Mie Scattering parameters expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
if (!mieDictionary.getValue("Coefficients.Extinction", _mieExtinctionCoeff)) {
errorReadingAtmosphereData = true;
LWARNING("No Mie Extinction parameters expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
if (!mieDictionary.getValue(keyMiePhaseConstant, _miePhaseConstant)) {
errorReadingAtmosphereData = true;
LWARNING("No Mie Phase Constant value expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
}
else {
errorReadingAtmosphereData = true;
LWARNING("No Mie parameters expecified for Atmosphere Effects of "
<< name << " planet.\nDisabling atmosphere effects for this planet.");
}
if (!errorReadingAtmosphereData) {
_atmosphereEnabled = true;
//// DEBUG:
//std::stringstream ss;
//ss << "\n\nAtmosphere Values:\n"
// << "Radius: " << _atmosphereRadius << std::endl
// << "Planet Radius: " << _atmospherePlanetRadius << std::endl
// << "Average Reflection: " << _planetAverageGroundReflectance << std::endl
// << "Rayleigh HR: " << _rayleighHeightScale << std::endl
// << "Mie HR: " << _mieHeightScale << std::endl
// << "Mie G phase constant: " << _miePhaseConstant << std::endl
// << "Mie Extinction coeff: " << _mieExtinctionCoeff << std::endl
// << "Rayleigh Scattering coeff: " << _rayleighScatteringCoeff << std::endl
// << "Mie Scattering coeff: " << _mieScatteringCoeff << std::endl;
//std::cout << ss.str() << std::endl;
}
}
}
RenderablePlanet::~RenderablePlanet() {
}
bool RenderablePlanet::initialize() {
RenderEngine& renderEngine = OsEng.renderEngine();
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Checking System State. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
if (_programObject == nullptr && _atmosphereEnabled && _shadowEnabled && _hasNightTexture) {
// shadow program
_programObject = renderEngine.buildRenderProgram(
"atmosphereAndShadowProgram",
"${MODULE_BASE}/shaders/atmosphere_vs.glsl",
"${MODULE_BASE}/shaders/atmosphere_fs.glsl");
if (!_programObject)
return false;
} else if (_programObject == nullptr && _shadowEnabled && _hasNightTexture) {
// shadow program
_programObject = renderEngine.buildRenderProgram(
"shadowNightProgram",
"${MODULE_BASE}/shaders/shadow_nighttexture_vs.glsl",
"${MODULE_BASE}/shaders/shadow_nighttexture_fs.glsl");
if (!_programObject)
return false;
}
else if (_programObject == nullptr && _shadowEnabled) {
// shadow program
_programObject = renderEngine.buildRenderProgram(
"shadowProgram",
"${MODULE_BASE}/shaders/shadow_vs.glsl",
"${MODULE_BASE}/shaders/shadow_fs.glsl");
if (!_programObject)
return false;
}
else if (_programObject == nullptr && _hasNightTexture) {
// Night texture program
_programObject = renderEngine.buildRenderProgram(
"nightTextureProgram",
"${MODULE_BASE}/shaders/nighttexture_vs.glsl",
"${MODULE_BASE}/shaders/nighttexture_fs.glsl");
if (!_programObject)
return false;
}
else if (_programObject == nullptr) {
// pscstandard
_programObject = renderEngine.buildRenderProgram(
"pscstandard",
"${MODULE_BASE}/shaders/pscstandard_vs.glsl",
"${MODULE_BASE}/shaders/pscstandard_fs.glsl");
if (!_programObject)
return false;
}
using IgnoreError = ghoul::opengl::ProgramObject::IgnoreError;
_programObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_programObject->setIgnoreUniformLocationError(IgnoreError::Yes);
/*_atmosphereProgramObject = renderEngine.buildRenderProgram(
"atmosphereDeferredProgram",
"${MODULE_BASE}/shaders/atmosphere_deferred_vs.glsl",
"${MODULE_BASE}/shaders/atmosphere_deferred_fs.glsl");
if (!_atmosphereProgramObject)
return false;*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error after load shading programs. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
loadTexture();
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error loading textures. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
_geometry->initialize(this);
_programObject->deactivate();
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Shader Programs Creation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//Atmosphere precomputation and tables
if (_atmosphereEnabled && !_atmosphereCalculated) {
_atmosphereCalculated = true;
preCalculateAtmosphereParam();
//createAtmosphereFBO();
createRenderQuad(&_atmosphereRenderVAO, &_atmosphereRenderVBO, 6);
}
count = 0;
return isReady();
}
bool RenderablePlanet::deinitialize() {
if(_geometry) {
_geometry->deinitialize();
delete _geometry;
}
RenderEngine& renderEngine = OsEng.renderEngine();
if (_programObject) {
renderEngine.removeRenderProgram(_programObject);
_programObject = nullptr;
}
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
if (_inScatteringProgramObject) {
renderEngine.removeRenderProgram(_inScatteringProgramObject);
_inScatteringProgramObject = nullptr;
}
if (_inScatteringSupTermsProgramObject) {
renderEngine.removeRenderProgram(_inScatteringSupTermsProgramObject);
_inScatteringSupTermsProgramObject = nullptr;
}
if (_deltaEProgramObject) {
renderEngine.removeRenderProgram(_deltaEProgramObject);
_deltaEProgramObject = nullptr;
}
if (_deltaSProgramObject) {
renderEngine.removeRenderProgram(_deltaSProgramObject);
_deltaSProgramObject = nullptr;
}
if (_deltaSSupTermsProgramObject) {
renderEngine.removeRenderProgram(_deltaSSupTermsProgramObject);
_deltaSSupTermsProgramObject = nullptr;
}
if (_deltaJProgramObject) {
renderEngine.removeRenderProgram(_deltaJProgramObject);
_deltaJProgramObject = nullptr;
}
_geometry = nullptr;
_texture = nullptr;
_nightTexture = nullptr;
_reflectanceTexture = nullptr;
_cloudsTexture = nullptr;
glDeleteTextures(1, &_transmittanceTableTexture);
glDeleteTextures(1, &_irradianceTableTexture);
glDeleteTextures(1, &_inScatteringTableTexture);
glDeleteTextures(1, &_deltaETableTexture);
glDeleteTextures(1, &_deltaSRayleighTableTexture);
glDeleteTextures(1, &_deltaSMieTableTexture);
glDeleteTextures(1, &_deltaJTableTexture);
glDeleteTextures(1, &_atmosphereTexture);
glDeleteFramebuffers(1, &_atmosphereFBO);
return true;
}
bool RenderablePlanet::isReady() const {
bool ready = true;
ready &= (_programObject != nullptr);
ready &= (_texture != nullptr);
ready &= (_geometry != nullptr);
return ready;
}
void RenderablePlanet::render(const RenderData& data)
{
// activate shader
_programObject->activate();
// scale the planet to appropriate size since the planet is a unit sphere
glm::mat4 transform = glm::mat4(1);
//earth needs to be rotated for that to work.
glm::mat4 rot = glm::rotate(transform, static_cast<float>(M_PI_2), glm::vec3(1, 0, 0));
glm::mat4 roty = glm::rotate(transform, static_cast<float>(M_PI_2), glm::vec3(0, -1, 0));
glm::mat4 rotProp = glm::rotate(transform, glm::radians(static_cast<float>(_rotation)), glm::vec3(0, 1, 0));
for (int i = 0; i < 3; i++){
for (int j = 0; j < 3; j++){
transform[i][j] = static_cast<float>(_stateMatrix[i][j]);
}
}
transform = transform * rot * roty * rotProp;
// setup the data to the shader
double lt;
glm::dvec3 sunPosFromPlanet =
SpiceManager::ref().targetPosition("SUN", _target, "GALACTIC", {}, _time, lt);
sunPosFromPlanet *= 1000.0; // from Km to m
psc sun_pos = PowerScaledCoordinate::CreatePowerScaledCoordinate(sunPosFromPlanet.x, sunPosFromPlanet.y, sunPosFromPlanet.z);
glm::dvec3 planetPosFromSun =
SpiceManager::ref().targetPosition(_target, "SUN", "GALACTIC", {}, _time, lt);
psc tmppos = PowerScaledCoordinate::CreatePowerScaledCoordinate(planetPosFromSun.x, planetPosFromSun.y, planetPosFromSun.z);
glm::vec3 cam_dir = glm::normalize(data.camera.position().vec3() - tmppos.vec3());
// This is camera position vector (camera direction) in world coordinates.
//_programObject->setUniform("cam_dir", cam_dir);
//glm::mat4 modelview = data.camera.viewMatrix()*data.camera.modelMatrix();
//glm::vec3 camSpaceEye = (-(modelview*data.position.vec4())).xyz;
//_programObject->setUniform("camdir", camSpaceEye);
_programObject->setUniform("transparency", _alpha);
_programObject->setUniform("ViewProjection", data.camera.viewProjectionMatrix());
_programObject->setUniform("ModelTransform", transform);
// Normal Transformation
glm::mat4 translateObjTrans = glm::translate(glm::mat4(1.0), data.position.vec3());
glm::mat4 translateCamTrans = glm::translate(glm::mat4(1.0), -data.camera.position().vec3());
float scaleFactor = data.camera.scaling().x * powf(10.0, data.camera.scaling().y);
glm::mat4 scaleCamTrans = glm::scale(glm::mat4(1.0), glm::vec3(scaleFactor));
// Is it wright not considering the camera rotation matrix here?
/*glm::mat4 ModelViewTrans = data.camera.viewMatrix() * scaleCamTrans *
data.camera.viewRotationMatrix() * translateCamTrans * translateObjTrans * transform;*/
glm::mat4 ModelViewTrans = data.camera.viewMatrix() * scaleCamTrans *
translateCamTrans * translateObjTrans * transform;
if (_atmosphereEnabled)
_programObject->setUniform("NormalTransform",
glm::transpose(glm::inverse(ModelViewTrans)));
setPscUniforms(*_programObject.get(), data.camera, data.position);
_programObject->setUniform("_performShading", _performShading);
_programObject->setUniform("_hasHeightMap", _hasHeightTexture);
_programObject->setUniform("_heightExaggeration", _heightExaggeration);
// Bind texture
ghoul::opengl::TextureUnit dayUnit;
ghoul::opengl::TextureUnit nightUnit;
ghoul::opengl::TextureUnit heightUnit;
dayUnit.activate();
_texture->bind();
_programObject->setUniform("texture1", dayUnit);
// Bind possible night texture
if (_hasNightTexture) {
nightUnit.activate();
_nightTexture->bind();
_programObject->setUniform("nightTex", nightUnit);
}
if (_hasHeightTexture) {
heightUnit.activate();
_heightMapTexture->bind();
_programObject->setUniform("heightTex", heightUnit);
}
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
// TODO: Move Calculations to VIEW SPACE (precision problems avoidance...)
// Shadow calculations..
if (!_shadowConfArray.empty()) {
std::vector<ShadowRenderingStruct> shadowDataArray;
shadowDataArray.reserve(_shadowConfArray.size());
for (const auto & shadowConf : _shadowConfArray) {
// TO REMEMBER: all distances and lengths in world coordinates are in meters!!! We need to move this to view space...
// Getting source and caster:
glm::dvec3 sourcePos = SpiceManager::ref().targetPosition(shadowConf.source.first, "SUN", "GALACTIC", {}, _time, lt);
sourcePos *= 1000.0; // converting to meters
glm::dvec3 casterPos = SpiceManager::ref().targetPosition(shadowConf.caster.first, "SUN", "GALACTIC", {}, _time, lt);
casterPos *= 1000.0; // converting to meters
psc caster_pos = PowerScaledCoordinate::CreatePowerScaledCoordinate(casterPos.x, casterPos.y, casterPos.z);
// First we determine if the caster is shadowing the current planet (all calculations in World Coordinates):
glm::vec3 planetCasterVec = (caster_pos - data.position).vec3();
glm::vec3 sourceCasterVec = glm::vec3(casterPos - sourcePos);
float sc_length = glm::length(sourceCasterVec);
glm::vec3 planetCaster_proj = (glm::dot(planetCasterVec, sourceCasterVec) / (sc_length*sc_length)) * sourceCasterVec;
float d_test = glm::length(planetCasterVec - planetCaster_proj);
float xp_test = shadowConf.caster.second * sc_length / (shadowConf.source.second + shadowConf.caster.second);
float rp_test = shadowConf.caster.second * (glm::length(planetCaster_proj) + xp_test) / xp_test;
float casterDistSun = glm::length(casterPos);
float planetDistSun = glm::length(data.position.vec3());
ShadowRenderingStruct shadowData;
shadowData.isShadowing = false;
if (((d_test - rp_test) < _planetRadius) &&
(casterDistSun < planetDistSun) ) {
// The current caster is shadowing the current planet
shadowData.isShadowing = true;
shadowData.rs = shadowConf.source.second;
shadowData.rc = shadowConf.caster.second;
shadowData.sourceCasterVec = sourceCasterVec;
shadowData.xp = xp_test;
shadowData.xu = shadowData.rc * sc_length / (shadowData.rs - shadowData.rc);
shadowData.casterPositionVec = glm::vec3(casterPos);
}
shadowDataArray.push_back(shadowData);
}
const std::string uniformVarName("shadowDataArray[");
unsigned int counter = 0;
for (const auto & sd : shadowDataArray) {
std::stringstream ss;
ss << uniformVarName << counter << "].isShadowing";
_programObject->setUniform(ss.str(), sd.isShadowing);
if (sd.isShadowing) {
ss.str(std::string());
ss << uniformVarName << counter << "].xp";
_programObject->setUniform(ss.str(), sd.xp);
ss.str(std::string());
ss << uniformVarName << counter << "].xu";
_programObject->setUniform(ss.str(), sd.xu);
/*ss.str(std::string());
ss << uniformVarName << counter << "].rs";
_programObject->setUniform(ss.str(), sd.rs);*/
ss.str(std::string());
ss << uniformVarName << counter << "].rc";
_programObject->setUniform(ss.str(), sd.rc);
ss.str(std::string());
ss << uniformVarName << counter << "].sourceCasterVec";
_programObject->setUniform(ss.str(), sd.sourceCasterVec);
ss.str(std::string());
ss << uniformVarName << counter << "].casterPositionVec";
_programObject->setUniform(ss.str(), sd.casterPositionVec);
}
counter++;
}
}
// Atmosphere Data
if (_atmosphereEnabled) {
// GLenum err;
// while ((err = glGetError()) != GL_NO_ERROR) {
// const GLubyte * errorString = gluErrorString(err);
// std::stringstream ss;
// ss << "Error setting up atmosphere framebuffer. OpenGL error: "
// << err << " - " << errorString << std::endl;
// LERROR(ss.str());
// }
// Object Space (in Km)
glm::mat4 obj2World = glm::translate(glm::mat4(1.0), data.position.vec3() / 1000.0f);
/*glm::mat4 M = data.camera.viewMatrix() * scaleCamTrans * glm::mat4(data.camera.viewRotationMatrix()) *
translateCamTrans * obj2World * transform;
*/
glm::mat4 M = glm::mat4(data.camera.combinedViewMatrix()) * scaleCamTrans * obj2World * transform;
glm::mat4 completeInverse = glm::inverse(M);
_programObject->setUniform("completeInverse", completeInverse);
_programObject->setUniform("projInverse", glm::inverse(data.camera.projectionMatrix()));
// This is camera position and planet position vector in object coordinates, in Km.
glm::mat4 world2Obj = glm::inverse(obj2World * transform);
glm::vec4 cameraPosObj = world2Obj * glm::vec4(data.camera.position().vec3() / 1000.0f, 1.0);
glm::vec4 planetPositionObj = world2Obj * glm::vec4(data.position.vec3() / 1000.0f, 1.0);
_programObject->setUniform("cameraPosObj", cameraPosObj);
_programObject->setUniform("planetPositionObj", planetPositionObj);
// I know it is (0,0,0). It is here just for sake of sanity. :-p
glm::dvec3 sunPosWorld =
SpiceManager::ref().targetPosition("SUN", "SUN", "GALACTIC", {}, _time, lt);
glm::vec4 sunPosObj = world2Obj * glm::vec4(sunPosWorld.x, sunPosWorld.y, sunPosWorld.z, 1.0);
_programObject->setUniform("sunPositionObj", glm::vec3(sunPosObj));
_transmittanceTableTextureUnit.activate();
_programObject->setUniform("transmittanceTexture", _transmittanceTableTextureUnit);
_irradianceTableTextureUnit.activate();
_programObject->setUniform("irradianceTexture", _irradianceTableTextureUnit);
_inScatteringTableTextureUnit.activate();
_programObject->setUniform("inscatterTexture", _inScatteringTableTextureUnit);
GLint m_viewport[4];
glGetIntegerv(GL_VIEWPORT, m_viewport);
_programObject->setUniform("screenX", (float)m_viewport[0]);
_programObject->setUniform("screenY", (float)m_viewport[1]);
_programObject->setUniform("screenWIDTH", (float)m_viewport[2]);
_programObject->setUniform("screenHEIGHT", (float)m_viewport[3]);
_programObject->setUniform("Rg", _atmospherePlanetRadius);
_programObject->setUniform("Rt", _atmosphereRadius);
_programObject->setUniform("AVERAGE_GROUND_REFLECTANCE", _planetAverageGroundReflectance);
_programObject->setUniform("HR", _rayleighHeightScale);
_programObject->setUniform("betaR", _rayleighScatteringCoeff);
_programObject->setUniform("HM", _mieHeightScale);
_programObject->setUniform("betaMSca", _mieScatteringCoeff);
_programObject->setUniform("betaMEx", _mieExtinctionCoeff);
_programObject->setUniform("mieG", _miePhaseConstant);
ghoul::opengl::TextureUnit reflectanceUnit;
if (_hasReflectanceTexture) {
reflectanceUnit.activate();
_reflectanceTexture->bind();
_programObject->setUniform("reflectanceTexture", reflectanceUnit);
}
ghoul::opengl::TextureUnit cloudsUnit;
if (_hasCloudsTexture) {
cloudsUnit.activate();
_cloudsTexture->bind();
_programObject->setUniform("cloudsTexture", cloudsUnit);
}
// HDR
_programObject->setUniform("exposure", 0.4f);
/*std::stringstream ss;
ss << "atmosphere-" << count++ << ".ppm";
saveTextureToPPMFile(GL_COLOR_ATTACHMENT0, ss.str(), m_viewport[2], m_viewport[3]);*/
}
// render
_geometry->render();
// disable shader
_programObject->deactivate();
//
//
//// Render Atmosphere to a texture:
//if (_atmosphereEnabled) {
// /*std::cout << "\nTestes..." << std::endl;
// glm::dvec3 sunPosSun = SpiceManager::ref().targetPosition("SUN", "SUN", "GALACTIC", {}, _time, lt);
// glm::dvec3 earthPosSun = SpiceManager::ref().targetPosition("EARTH", "SUN", "GALACTIC", {}, _time, lt);
// std::cout << "\n\nSun in Sun: " << sunPosSun.x << ", " << sunPosSun.y << ", " << sunPosSun.z << std::endl;
// std::cout << "\n\nEarth in Sun: " << earthPosSun.x << ", " << earthPosSun.y << ", " << earthPosSun.z << std::endl;
// std::cout << "\n\nCam Position in Sun: " << data.camera.position().vec3().x << ", " << data.camera.position().vec3().y << ", " << data.camera.position().vec3().z << std::endl;
// std::cout << "\n\nCam Position from Earth in Sun: " << cam_dir.x << ", " << cam_dir.y << ", " << cam_dir.z << std::endl;
//
// glm::dmat3 sun2earthMat = SpiceManager::ref().frameTransformationMatrix("GALACTIC", "IAU_EARTH", _time);
// glm::dvec3 sunPosEarth = sun2earthMat * sunPosSun;
// glm::dvec3 earthPosEarth = sun2earthMat * earthPosSun;
// glm::dvec3 camDirEarth = sun2earthMat * cam_dir;
// glm::dvec3 camPosEarth = sun2earthMat * data.camera.position().vec3();
// std::cout << "\n\nSun in Earth: " << sunPosEarth.x << ", " << sunPosEarth.y << ", " << sunPosEarth.z << std::endl;
// std::cout << "\n\nEarth in Earth: " << earthPosEarth.x << ", " << earthPosEarth.y << ", " << earthPosEarth.z << std::endl;
// std::cout << "\n\nCam Position in Earth: " << camPosEarth.x << ", " << camPosEarth.y << ", " << camPosEarth.z << std::endl;
// std::cout << "\n\nCam Position from Earth in Earth: " << camDirEarth.x << ", " << camDirEarth.y << ", " << camDirEarth.z << std::endl;
// glm::dvec3 sunPosView = glm::dvec3(data.camera.viewMatrix() * glm::dvec4(sunPosSun.x, sunPosSun.y, sunPosSun.z, 1.0));
// glm::dvec3 earthPosView = glm::dvec3(data.camera.viewMatrix() * glm::dvec4(earthPosSun.x, earthPosSun.y, earthPosSun.z, 1.0));
// glm::dvec3 camDirView = glm::dvec3(data.camera.viewMatrix() * glm::dvec4(cam_dir.x, cam_dir.y, cam_dir.z, 0.0));
// glm::dvec3 camPosView = glm::dvec3(data.camera.viewMatrix() * glm::dvec4(data.camera.position().vec3().x, data.camera.position().vec3().y, data.camera.position().vec3().z, 1.0));
// std::cout << "\n\nSun in View: " << sunPosView.x << ", " << sunPosView.y << ", " << sunPosView.z << std::endl;
// std::cout << "\n\nEarth in View: " << earthPosView.x << ", " << earthPosView.y << ", " << earthPosView.z << std::endl;
// std::cout << "\n\nCam Position in View: " << camPosView.x << ", " << camPosView.y << ", " << camPosView.z << std::endl;
// std::cout << "\n\nCam Position from Earth in View: " << camDirView.x << ", " << camDirView.y << ", " << camDirView.z << std::endl;*/
// GLint defaultFBO;
// glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO);
// GLint m_viewport[4];
// glGetIntegerv(GL_VIEWPORT, m_viewport);
// glBindFramebuffer(GL_FRAMEBUFFER, _atmosphereFBO);
// glReadBuffer(GL_COLOR_ATTACHMENT1);
// GLenum drawBuffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
// glDrawBuffers(2, drawBuffers);
// if (!glIsTexture(_dummyTexture)) {
// _dummyTextureUnit.activate();
// glGenTextures(1, &_dummyTexture);
// //glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, _dummyTexture);
// glBindTexture(GL_TEXTURE_2D, _dummyTexture);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
// glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_viewport[2],
// m_viewport[3], 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
// /*glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 8, GL_RGBA,
// m_viewport[2], m_viewport[3], true);*/
// }
// glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummyTexture, 0);
// glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _atmosphereTexture, 0);
// //glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, _dummyTexture, 0);
// //glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D_MULTISAMPLE, _atmosphereTexture, 0);
// if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
// LERROR("Atmosphere Framework not built.");
// GLenum fbErr = glCheckFramebufferStatus(GL_FRAMEBUFFER);
// switch (fbErr) {
// case GL_FRAMEBUFFER_UNDEFINED:
// LERROR("Indefined framebuffer.");
// break;
// case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
// LERROR("Incomplete, missing attachement.");
// break;
// case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
// LERROR("Framebuffer doesn't have at least one image attached to it.");
// break;
// case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
// LERROR("Returned if the value of GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE is GL_NONE for any color attachment point(s) named by GL_DRAW_BUFFERi.");
// break;
// case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
// LERROR("Returned if GL_READ_BUFFER is not GL_NONE and the value of GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE is GL_NONE for the color attachment point named by GL_READ_BUFFER.");
// break;
// case GL_FRAMEBUFFER_UNSUPPORTED:
// LERROR("Returned if the combination of internal formats of the attached images violates an implementation - dependent set of restrictions.");
// break;
// case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:
// LERROR("Returned if the value of GL_RENDERBUFFER_SAMPLES is not the same for all attached renderbuffers; if the value of GL_TEXTURE_SAMPLES is the not same for all attached textures; or , if the attached images are a mix of renderbuffers and textures, the value of GL_RENDERBUFFER_SAMPLES does not match the value of GL_TEXTURE_SAMPLES.");
// LERROR("Returned if the value of GL_TEXTURE_FIXED_SAMPLE_LOCATIONS is not the same for all attached textures; or , if the attached images are a mix of renderbuffers and textures, the value of GL_TEXTURE_FIXED_SAMPLE_LOCATIONS is not GL_TRUE for all attached textures.");
// break;
// case GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS:
// LERROR("Returned if any framebuffer attachment is layered, and any populated attachment is not layered, or if all populated color attachments are not from textures of the same target.");
// break;
// }
// }
// GLenum err;
// while ((err = glGetError()) != GL_NO_ERROR) {
// const GLubyte * errorString = gluErrorString(err);
// std::stringstream ss;
// ss << "Error setting up atmosphere framebuffer. OpenGL error: "
// << err << " - " << errorString << std::endl;
// LERROR(ss.str());
// }
// glClearColor(1.0, 0.0, 0.0, 1.0);
// glClear(GL_COLOR_BUFFER_BIT);
//
// _atmosphereProgramObject->activate();
// //glm::vec2 camScaling = data.camera.scaling();
// ///*glm::mat4 invScaling = glm::scale(glm::mat4(1.0), glm::vec3(1.0 / (camScaling.x * pow(10.0, camScaling.y))));
// //glm::mat4 invCamRot = glm::inverse(data.camera.viewRotationMatrix());
// //glm::mat4 invTrans = glm::translate(glm::mat4(1.0), glm::vec3(-data.camera.position().vec4()));*/
// //glm::mat4 camScaleTrans = glm::scale(glm::mat4(1.0), glm::vec3(camScaling.x * pow(10.0, camScaling.y)));
// //glm::mat4 camRotationTrans = glm::mat4(glm::mat3(data.camera.viewRotationMatrix()));
// //glm::mat4 camTranslationTrans = glm::translate(glm::mat4(1.0), glm::vec3(-data.camera.position().vec4()));
// //glm::mat4 completeInverse = glm::inverse(data.camera.viewProjectionMatrix() * camScaleTrans *
// // camRotationTrans * camTranslationTrans);
// // Object Space (in Km)
// glm::mat4 obj2World = glm::translate(glm::mat4(1.0), data.position.vec3() / 1000.0f);
// glm::mat4 M = data.camera.viewMatrix() * scaleCamTrans * data.camera.viewRotationMatrix() *
// translateCamTrans * obj2World * transform;
// // World Space
// /*glm::mat4 M = data.camera.viewMatrix() * scaleCamTrans * data.camera.viewRotationMatrix() *
// translateCamTrans;*/
// //glm::mat4 completeInverse = glm::inverse(data.camera.projectionMatrix() * M);
// glm::mat4 completeInverse = glm::inverse(M);
// //glm::mat4 completeInverse = glm::inverse(data.camera.projectionMatrix() * ModelViewTrans);
// _atmosphereProgramObject->setUniform("completeInverse", completeInverse);
// _atmosphereProgramObject->setUniform("projInverse", glm::inverse(data.camera.projectionMatrix()));
//
// //// This is camera position and planet position vector in world coordinates, in Km.
// //glm::vec4 cameraPosWorld = glm::vec4(data.camera.position().vec3() / 1000.0f, 1.0);
// //glm::vec4 planetPositionWorld = glm::vec4(data.position.vec3() / 1000.0f, 1.0);
// //_atmosphereProgramObject->setUniform("cameraPosWorld", cameraPosWorld);
// //_atmosphereProgramObject->setUniform("planetPosition", planetPositionWorld);
// //// I know it is (0,0,0). It is here just for sake of sanity. :-p
// //glm::dvec3 sunPosWorld =
// // SpiceManager::ref().targetPosition("SUN", "SUN", "GALACTIC", {}, _time, lt);
// //_atmosphereProgramObject->setUniform("sunPositionWorld", sunPosWorld);
// // This is camera position and planet position vector in object coordinates, in Km.
// glm::mat4 world2Obj = glm::inverse(obj2World * transform);
// glm::vec4 cameraPosObj = world2Obj * glm::vec4(data.camera.position().vec3() / 1000.0f, 1.0);
// glm::vec4 planetPositionObj = world2Obj * glm::vec4(data.position.vec3() / 1000.0f, 1.0);
// _atmosphereProgramObject->setUniform("cameraPosObj", cameraPosObj);
// _atmosphereProgramObject->setUniform("planetPositionObj", planetPositionObj);
//
// // I know it is (0,0,0). It is here just for sake of sanity. :-p
// glm::dvec3 sunPosWorld =
// SpiceManager::ref().targetPosition("SUN", "SUN", "GALACTIC", {}, _time, lt);
// glm::vec4 sunPosObj = world2Obj * glm::vec4(sunPosWorld.x, sunPosWorld.y, sunPosWorld.z, 1.0);
// _atmosphereProgramObject->setUniform("sunPositionObj", glm::vec3(sunPosObj));
// //// DEBUG:
// //std::cout << "\n\nSun in Obj Space: " << sunPosObj.x << ", " << sunPosObj.y << ", " << sunPosObj.z << std::endl;
// //std::cout << "\n\nEarth in Obj Space: " << planetPositionObj.x << ", " << planetPositionObj.y << ", " << planetPositionObj.z << std::endl;
// //std::cout << "\n\nCam in Obj Space: " << cameraPosObj.x << ", " << cameraPosObj.y << ", " << cameraPosObj.z << std::endl;
//
// _transmittanceTableTextureUnit.activate();
// //glBindTexture(GL_TEXTURE_2D, _transmittanceTableTexture);
// _atmosphereProgramObject->setUniform("transmittanceSampler", _transmittanceTableTextureUnit);
// _irradianceTableTextureUnit.activate();
// //glBindTexture(GL_TEXTURE_2D, _irradianceTableTexture);
// _atmosphereProgramObject->setUniform("irradianceSampler", _irradianceTableTextureUnit);
// _inScatteringTableTextureUnit.activate();
// //glBindTexture(GL_TEXTURE_3D, _inScatteringTableTexture);
// _atmosphereProgramObject->setUniform("inscatterSampler", _inScatteringTableTextureUnit);
//
// if (_hasReflectanceTexture) {
// ghoul::opengl::TextureUnit reflectanceUnit;
// reflectanceUnit.activate();
// _reflectanceTexture->bind();
// _atmosphereProgramObject->setUniform("reflectanceSampler", reflectanceUnit);
// }
// // HDR
// _atmosphereProgramObject->setUniform("exposure", 0.4f);
// setPscUniforms(*_atmosphereProgramObject.get(), data.camera, data.position);
// // check OpenGL error
// while ((err = glGetError()) != GL_NO_ERROR) {
// const GLubyte * errorString = gluErrorString(err);
// std::cout << "\n\nBefore Rendering Planet. OpenGL error: "
// << err << " - " << errorString << std::endl;
// }
// renderQuadForCalc(_atmosphereRenderVAO, 6);
// std::stringstream ss;
// ss << "atmosphere-" << count++ << ".ppm";
// saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, ss.str(), m_viewport[2], m_viewport[3]);
// _atmosphereProgramObject->deactivate();
// glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO);
// glViewport(m_viewport[0], m_viewport[1],
// m_viewport[2], m_viewport[3]);
//}
}
void RenderablePlanet::update(const UpdateData& data) {
// set spice-orientation in accordance to timestamp
_stateMatrix = SpiceManager::ref().positionTransformMatrix(_frame, "GALACTIC", data.time);
_time = data.time;
}
void RenderablePlanet::loadTexture() {
_texture = nullptr;
if (_colorTexturePath.value() != "") {
_texture = std::move(ghoul::io::TextureReader::ref().loadTexture(absPath(_colorTexturePath)));
if (_texture) {
LDEBUG("Loaded texture from '" << _colorTexturePath << "'");
_texture->uploadTexture();
// Textures of planets looks much smoother with AnisotropicMipMap rather than linear
// TODO: AnisotropicMipMap crashes on ATI cards ---abock
//_texture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
_texture->setFilter(ghoul::opengl::Texture::FilterMode::Linear);
}
}
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error after reading memory 1. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
if (_hasNightTexture) {
_nightTexture = nullptr;
if (_nightTexturePath.value() != "") {
_nightTexture = std::move(ghoul::io::TextureReader::ref().loadTexture(absPath(_nightTexturePath)));
if (_nightTexture) {
LDEBUG("Loaded texture from '" << _nightTexturePath << "'");
_nightTexture->uploadTexture();
_nightTexture->setFilter(ghoul::opengl::Texture::FilterMode::Linear);
//_nightTexture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
}
}
}
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error after reading memory 2. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
if (_hasReflectanceTexture) {
_reflectanceTexture = nullptr;
if (_reflectanceTexturePath.value() != "") {
_reflectanceTexture = std::move(ghoul::io::TextureReader::ref().loadTexture(absPath(_reflectanceTexturePath)));
if (_reflectanceTexture) {
LDEBUG("Loaded texture from '" << _reflectanceTexturePath << "'");
_reflectanceTexture->uploadTexture();
_reflectanceTexture->setFilter(ghoul::opengl::Texture::FilterMode::Linear);
//_reflectanceTexture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
}
}
}
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error after reading memory 3. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
if (_hasHeightTexture) {
_heightMapTexture = nullptr;
if (_heightMapTexturePath.value() != "") {
_heightMapTexture = std::move(ghoul::io::TextureReader::ref().loadTexture(absPath(_heightMapTexturePath)));
if (_heightMapTexture) {
LDEBUG("Loaded texture from '" << _heightMapTexturePath << "'");
_heightMapTexture->uploadTexture();
_heightMapTexture->setFilter(ghoul::opengl::Texture::FilterMode::Linear);
//_nightTexture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
}
}
}
// while ((err = glGetError()) != GL_NO_ERROR) {
// const GLubyte * errString = gluErrorString(err);
// std::stringstream ss;
// ss << "Error after reading memory 4. OpenGL error: " << errString << std::endl;
// LERROR(ss.str());
// }
if (_hasCloudsTexture) {
_cloudsTexture = nullptr;
if (_cloudsTexturePath.value() != "") {
_cloudsTexture = std::move(ghoul::io::TextureReader::ref().loadTexture(absPath(_cloudsTexturePath)));
if (_cloudsTexture) {
LDEBUG("Loaded texture from '" << _cloudsTexturePath << "'");
_cloudsTexture->uploadTexture();
_cloudsTexture->setFilter(ghoul::opengl::Texture::FilterMode::Linear);
//_cloudsTexture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
}
}
}
// while ((err = glGetError()) != GL_NO_ERROR) {
// const GLubyte * errString = gluErrorString(err);
// std::stringstream ss;
// ss << "Error after reading memory 5. OpenGL error: " << errString << std::endl;
// LERROR(ss.str());
// }
}
void RenderablePlanet::loadComputationPrograms() {
RenderEngine& renderEngine = OsEng.renderEngine();
//============== Transmittance =================
if (_transmittanceProgramObject == nullptr) {
_transmittanceProgramObject = renderEngine.buildRenderProgram(
"transmittanceCalcProgram",
"${MODULE_BASE}/shaders/transmittance_calc_vs.glsl",
"${MODULE_BASE}/shaders/transmittance_calc_fs.glsl");
if (!_transmittanceProgramObject) {
return;
}
}
using IgnoreError = ghoul::opengl::ProgramObject::IgnoreError;
_transmittanceProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_transmittanceProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
//============== Irradiance =================
if (_irradianceProgramObject == nullptr) {
_irradianceProgramObject = renderEngine.buildRenderProgram(
"irradianceCalcProgram",
"${MODULE_BASE}/shaders/irradiance_calc_vs.glsl",
"${MODULE_BASE}/shaders/irradiance_calc_fs.glsl");
if (!_irradianceProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
return;
}
}
_irradianceProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_irradianceProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
if (_irradianceSupTermsProgramObject == nullptr) {
_irradianceSupTermsProgramObject = renderEngine.buildRenderProgram(
"irradianceSupTermsCalcProgram",
"${MODULE_BASE}/shaders/irradiance_sup_calc_vs.glsl",
"${MODULE_BASE}/shaders/irradiance_sup_calc_fs.glsl");
if (!_irradianceSupTermsProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
return;
}
}
_irradianceSupTermsProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_irradianceSupTermsProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
//============== InScattering =================
if (_inScatteringProgramObject == nullptr) {
_inScatteringProgramObject = renderEngine.buildRenderProgram(
"inScatteringCalcProgram",
"${MODULE_BASE}/shaders/inScattering_calc_vs.glsl",
"${MODULE_BASE}/shaders/inScattering_calc_fs.glsl",
"${MODULE_BASE}/shaders/inScattering_calc_gs.glsl");
if (!_inScatteringProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
return;
}
}
_inScatteringProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_inScatteringProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
if (_inScatteringSupTermsProgramObject == nullptr) {
_inScatteringSupTermsProgramObject = renderEngine.buildRenderProgram(
"inScatteringSupTermsCalcProgram",
"${MODULE_BASE}/shaders/inScattering_sup_calc_vs.glsl",
"${MODULE_BASE}/shaders/inScattering_sup_calc_fs.glsl",
"${MODULE_BASE}/shaders/inScattering_sup_calc_gs.glsl");
if (!_inScatteringSupTermsProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
if (_inScatteringProgramObject) {
renderEngine.removeRenderProgram(_inScatteringProgramObject);
_inScatteringProgramObject = nullptr;
}
return;
}
}
_inScatteringSupTermsProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_inScatteringSupTermsProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
//============== Delta E =================
if (_deltaEProgramObject == nullptr) {
_deltaEProgramObject = renderEngine.buildRenderProgram(
"deltaECalcProgram",
"${MODULE_BASE}/shaders/deltaE_calc_vs.glsl",
"${MODULE_BASE}/shaders/deltaE_calc_fs.glsl");
if (!_deltaEProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
if (_inScatteringProgramObject) {
renderEngine.removeRenderProgram(_inScatteringProgramObject);
_inScatteringProgramObject = nullptr;
}
if (_inScatteringSupTermsProgramObject) {
renderEngine.removeRenderProgram(_inScatteringSupTermsProgramObject);
_inScatteringSupTermsProgramObject = nullptr;
}
return;
}
}
_deltaEProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_deltaEProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
//============== Delta S =================
if (_deltaSProgramObject == nullptr) {
_deltaSProgramObject = renderEngine.buildRenderProgram(
"deltaSCalcProgram",
"${MODULE_BASE}/shaders/deltaS_calc_vs.glsl",
"${MODULE_BASE}/shaders/deltaS_calc_fs.glsl",
"${MODULE_BASE}/shaders/deltaS_calc_gs.glsl");
if (!_deltaSProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
if (_inScatteringProgramObject) {
renderEngine.removeRenderProgram(_inScatteringProgramObject);
_inScatteringProgramObject = nullptr;
}
if (_inScatteringSupTermsProgramObject) {
renderEngine.removeRenderProgram(_inScatteringSupTermsProgramObject);
_inScatteringSupTermsProgramObject = nullptr;
}
if (_deltaEProgramObject) {
renderEngine.removeRenderProgram(_deltaEProgramObject);
_deltaEProgramObject = nullptr;
}
return;
}
}
_deltaSProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_deltaSProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
if (_deltaSSupTermsProgramObject == nullptr) {
_deltaSSupTermsProgramObject = renderEngine.buildRenderProgram(
"deltaSSUPTermsCalcProgram",
"${MODULE_BASE}/shaders/deltaS_sup_calc_vs.glsl",
"${MODULE_BASE}/shaders/deltaS_sup_calc_fs.glsl",
"${MODULE_BASE}/shaders/deltaS_sup_calc_gs.glsl");
if (!_deltaSSupTermsProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
if (_inScatteringProgramObject) {
renderEngine.removeRenderProgram(_inScatteringProgramObject);
_inScatteringProgramObject = nullptr;
}
if (_inScatteringSupTermsProgramObject) {
renderEngine.removeRenderProgram(_inScatteringSupTermsProgramObject);
_inScatteringSupTermsProgramObject = nullptr;
}
if (_deltaEProgramObject) {
renderEngine.removeRenderProgram(_deltaEProgramObject);
_deltaEProgramObject = nullptr;
}
if (_deltaSProgramObject) {
renderEngine.removeRenderProgram(_deltaSProgramObject);
_deltaSProgramObject = nullptr;
}
return;
}
}
_deltaSSupTermsProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_deltaSSupTermsProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
//============== Delta J (Radiance Scattered) =================
if (_deltaJProgramObject == nullptr) {
// shadow program
_deltaJProgramObject = renderEngine.buildRenderProgram(
"deltaJCalcProgram",
"${MODULE_BASE}/shaders/deltaJ_calc_vs.glsl",
"${MODULE_BASE}/shaders/deltaJ_calc_fs.glsl",
"${MODULE_BASE}/shaders/deltaJ_calc_gs.glsl");
if (!_deltaJProgramObject) {
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
if (_inScatteringProgramObject) {
renderEngine.removeRenderProgram(_inScatteringProgramObject);
_inScatteringProgramObject = nullptr;
}
if (_inScatteringSupTermsProgramObject) {
renderEngine.removeRenderProgram(_inScatteringSupTermsProgramObject);
_inScatteringSupTermsProgramObject = nullptr;
}
if (_deltaEProgramObject) {
renderEngine.removeRenderProgram(_deltaEProgramObject);
_deltaEProgramObject = nullptr;
}
if (_deltaSProgramObject) {
renderEngine.removeRenderProgram(_deltaSProgramObject);
_deltaSProgramObject = nullptr;
}
if (_deltaSSupTermsProgramObject) {
renderEngine.removeRenderProgram(_deltaSSupTermsProgramObject);
_deltaSSupTermsProgramObject = nullptr;
}
return;
}
}
_deltaJProgramObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
_deltaJProgramObject->setIgnoreUniformLocationError(IgnoreError::Yes);
}
void RenderablePlanet::unloadComputationPrograms() {
RenderEngine& renderEngine = OsEng.renderEngine();
if (_transmittanceProgramObject) {
renderEngine.removeRenderProgram(_transmittanceProgramObject);
_transmittanceProgramObject = nullptr;
}
if (_irradianceProgramObject) {
renderEngine.removeRenderProgram(_irradianceProgramObject);
_irradianceProgramObject = nullptr;
}
if (_irradianceSupTermsProgramObject) {
renderEngine.removeRenderProgram(_irradianceSupTermsProgramObject);
_irradianceSupTermsProgramObject = nullptr;
}
if (_inScatteringProgramObject) {
renderEngine.removeRenderProgram(_inScatteringProgramObject);
_inScatteringProgramObject = nullptr;
}
if (_inScatteringSupTermsProgramObject) {
renderEngine.removeRenderProgram(_inScatteringSupTermsProgramObject);
_inScatteringSupTermsProgramObject = nullptr;
}
if (_deltaEProgramObject) {
renderEngine.removeRenderProgram(_deltaEProgramObject);
_deltaEProgramObject = nullptr;
}
if (_deltaSProgramObject) {
renderEngine.removeRenderProgram(_deltaSProgramObject);
_deltaSProgramObject = nullptr;
}
if (_deltaSSupTermsProgramObject) {
renderEngine.removeRenderProgram(_deltaSSupTermsProgramObject);
_deltaSSupTermsProgramObject = nullptr;
}
if (_deltaJProgramObject) {
renderEngine.removeRenderProgram(_deltaJProgramObject);
_deltaJProgramObject = nullptr;
}
}
void RenderablePlanet::createComputationTextures() {
// TODO: Change precision of textures: GL_RGB16F to GL_RGB32F
//========== Create Tables (textures) ==============
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error before creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
_dummyTextureUnit.activate();
glGenTextures(1, &_dummyTexture);
glBindTexture(GL_TEXTURE_2D, _dummyTexture);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, TRANSMITTANCE_TABLE_WIDTH,
TRANSMITTANCE_TABLE_HEIGHT, 0, GL_RGB, GL_FLOAT, nullptr);
//GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 1 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
ghoul::opengl::TextureUnit _dummy3DTextureUnit;
_dummy3DTextureUnit.activate();
glGenTextures(1, &_dummy3DTexture);
glBindTexture(GL_TEXTURE_3D, _dummy3DTexture);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB16F, MU_S_SAMPLES * NU_SAMPLES,
MU_SAMPLES, R_SAMPLES, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 2 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//============== Transmittance =================
_transmittanceTableTextureUnit.activate();
glGenTextures(1, &_transmittanceTableTexture);
glBindTexture(GL_TEXTURE_2D, _transmittanceTableTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, TRANSMITTANCE_TABLE_WIDTH,
TRANSMITTANCE_TABLE_HEIGHT, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 3 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//============== Irradiance =================
_irradianceTableTextureUnit.activate();
glGenTextures(1, &_irradianceTableTexture);
glBindTexture(GL_TEXTURE_2D, _irradianceTableTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, IRRADIANCE_TABLE_WIDTH,
IRRADIANCE_TABLE_HEIGHT, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 4 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//============== InScattering =================
_inScatteringTableTextureUnit.activate();
glGenTextures(1, &_inScatteringTableTexture);
glBindTexture(GL_TEXTURE_3D, _inScatteringTableTexture);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA16F_ARB, MU_S_SAMPLES * NU_SAMPLES,
MU_SAMPLES, R_SAMPLES, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 5 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//============== Delta E =================
_deltaETableTextureUnit.activate();
glGenTextures(1, &_deltaETableTexture);
glBindTexture(GL_TEXTURE_2D, _deltaETableTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, DELTA_E_TABLE_WIDTH,
DELTA_E_TABLE_HEIGHT, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 6 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//============== Delta S =================
_deltaSRayleighTableTextureUnit.activate();
glGenTextures(1, &_deltaSRayleighTableTexture);
glBindTexture(GL_TEXTURE_3D, _deltaSRayleighTableTexture);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB16F, MU_S_SAMPLES * NU_SAMPLES,
MU_SAMPLES, R_SAMPLES, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 7 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
_deltaSMieTableTextureUnit.activate();
glGenTextures(1, &_deltaSMieTableTexture);
glBindTexture(GL_TEXTURE_3D, _deltaSMieTableTexture);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB16F, MU_S_SAMPLES * NU_SAMPLES,
MU_SAMPLES, R_SAMPLES, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 8 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//============== Delta J (Radiance Scattered) =================
_deltaJTableTextureUnit.activate();
glGenTextures(1, &_deltaJTableTexture);
glBindTexture(GL_TEXTURE_3D, _deltaJTableTexture);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB16F, MU_S_SAMPLES * NU_SAMPLES,
MU_SAMPLES, R_SAMPLES, 0, GL_RGB, GL_FLOAT, nullptr);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error 9 creating OpenGL textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
}
void RenderablePlanet::deleteComputationTextures() {
// Cleaning up
glDeleteTextures(1, &_dummyTexture);
glDeleteTextures(1, &_dummy3DTexture);
glDeleteTextures(1, &_transmittanceTableTexture);
glDeleteTextures(1, &_irradianceTableTexture);
glDeleteTextures(1, &_inScatteringTableTexture);
glDeleteTextures(1, &_deltaETableTexture);
glDeleteTextures(1, &_deltaSRayleighTableTexture);
glDeleteTextures(1, &_deltaSMieTableTexture);
glDeleteTextures(1, &_deltaJTableTexture);
}
void RenderablePlanet::deleteUnusedComputationTextures() {
glDeleteTextures(1, &_dummyTexture);
glDeleteTextures(1, &_dummy3DTexture);
glDeleteTextures(1, &_deltaETableTexture);
glDeleteTextures(1, &_deltaSRayleighTableTexture);
glDeleteTextures(1, &_deltaSMieTableTexture);
glDeleteTextures(1, &_deltaJTableTexture);
}
void RenderablePlanet::loadAtmosphereDataIntoShaderProgram(std::unique_ptr<ghoul::opengl::ProgramObject> & shaderProg) {
shaderProg->setUniform("Rg", _atmospherePlanetRadius);
shaderProg->setUniform("Rt", _atmosphereRadius);
shaderProg->setUniform("AVERAGE_GROUND_REFLECTANCE", _planetAverageGroundReflectance);
shaderProg->setUniform("HR", _rayleighHeightScale);
shaderProg->setUniform("betaR", _rayleighScatteringCoeff);
shaderProg->setUniform("HM", _mieHeightScale);
shaderProg->setUniform("betaMSca", _mieScatteringCoeff);
shaderProg->setUniform("betaMEx", _mieExtinctionCoeff);
shaderProg->setUniform("mieG", _miePhaseConstant);
}
void RenderablePlanet::executeCalculations(const GLuint vao, const GLenum drawBuffers[2], const GLsizei vertexSize) {
// ===========================================================
// See Precomputed Atmosphere Scattering from Bruneton et al. paper, algorithm 4.1:
// ===========================================================
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummyTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _transmittanceTableTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, TRANSMITTANCE_TABLE_WIDTH, TRANSMITTANCE_TABLE_HEIGHT);
_transmittanceProgramObject->activate();
loadAtmosphereDataIntoShaderProgram(_transmittanceProgramObject);
renderQuadForCalc(vao, vertexSize);
/*saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, std::string("transmittance_texture.ppm"),
TRANSMITTANCE_TABLE_WIDTH, TRANSMITTANCE_TABLE_HEIGHT);*/
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 1. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// line 2 in algorithm 4.1
glBindTexture(GL_TEXTURE_2D, _dummyTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F,
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT, 0,
GL_RGB, GL_FLOAT, nullptr);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummyTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _deltaETableTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);
_irradianceProgramObject->activate();
_irradianceProgramObject->setUniform("transmittanceTexture", _transmittanceTableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_irradianceProgramObject);
renderQuadForCalc(vao, vertexSize);
/*saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, std::string("deltaE_table_texture.ppm"),
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 2. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// line 3 in algorithm 4.1
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummy3DTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _deltaSRayleighTableTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, _deltaSMieTableTexture, 0);
GLenum colorBuffers[3] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2 };
glDrawBuffers(3, colorBuffers);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);
_inScatteringProgramObject->activate();
_inScatteringProgramObject->setUniform("transmittanceTexture", _transmittanceTableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_inScatteringProgramObject);
for (int layer = 0; layer < R_SAMPLES; ++layer) {
step3DTexture(_inScatteringProgramObject, layer);
renderQuadForCalc(vao, vertexSize);
}
/*saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, std::string("deltaS_rayleigh_texture.ppm"),
MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);
saveTextureToPPMFile(GL_COLOR_ATTACHMENT2, std::string("deltaS_mie_texture.ppm"),
MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);*/
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, 0, 0);
glDrawBuffers(2, drawBuffers);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 3. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// line 4 in algorithm 4.1
glBindTexture(GL_TEXTURE_2D, _dummyTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F,
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT, 0,
GL_RGB, GL_FLOAT, nullptr);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummyTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _irradianceTableTexture, 0);
glDrawBuffers(2, drawBuffers);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);
_deltaEProgramObject->activate();
_deltaEProgramObject->setUniform("line", 4);
_deltaEProgramObject->setUniform("deltaETexture", _deltaETableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_deltaEProgramObject);
renderQuadForCalc(vao, vertexSize);
/*saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, std::string("irradiance_texture.ppm"),
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 4. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// line 5 in algorithm 4.1
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummy3DTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _inScatteringTableTexture, 0);
glViewport(0, 0, MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);
_deltaSProgramObject->activate();
_deltaSProgramObject->setUniform("deltaSRTexture", _deltaSRayleighTableTextureUnit);
_deltaSProgramObject->setUniform("deltaSMTexture", _deltaSMieTableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_deltaSProgramObject);
for (int layer = 0; layer < R_SAMPLES; ++layer) {
step3DTexture(_deltaSProgramObject, layer, false);
renderQuadForCalc(vao, vertexSize);
}
/*saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, std::string("S_texture.ppm"),
MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 5. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// loop in line 6 in algorithm 4.1
for (int scatteringOrder = 2; scatteringOrder <= 4; ++scatteringOrder) {
// line 7 in algorithm 4.1
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummy3DTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _deltaJTableTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);
_deltaJProgramObject->activate();
if (scatteringOrder == 2)
_deltaJProgramObject->setUniform("first", 1.0f);
else
_deltaJProgramObject->setUniform("first", 0.0f);
_deltaJProgramObject->setUniform("transmittanceTexture", _transmittanceTableTextureUnit);
_deltaJProgramObject->setUniform("deltaETexture", _deltaETableTextureUnit);
_deltaJProgramObject->setUniform("deltaSRTexture", _deltaSRayleighTableTextureUnit);
_deltaJProgramObject->setUniform("deltaSMTexture", _deltaSMieTableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_deltaJProgramObject);
for (int layer = 0; layer < R_SAMPLES; ++layer) {
step3DTexture(_deltaJProgramObject, layer);
renderQuadForCalc(vao, vertexSize);
}
/*std::stringstream sst;
sst << "deltaJ_texture-scattering_order-" << scatteringOrder << ".ppm";
saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, sst.str(),
MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 6. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// line 8 in algorithm 4.1
glBindTexture(GL_TEXTURE_2D, _dummyTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F,
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT, 0,
GL_RGB, GL_FLOAT, nullptr);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummyTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _deltaETableTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);
_irradianceSupTermsProgramObject->activate();
if (scatteringOrder == 2)
_irradianceSupTermsProgramObject->setUniform("first", 1.0f);
else
_irradianceSupTermsProgramObject->setUniform("first", 0.0f);
_irradianceSupTermsProgramObject->setUniform("transmittanceTexture", _transmittanceTableTextureUnit);
_irradianceSupTermsProgramObject->setUniform("deltaSRTexture", _deltaSRayleighTableTextureUnit);
_irradianceSupTermsProgramObject->setUniform("deltaSMTexture", _deltaSMieTableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_irradianceSupTermsProgramObject);
renderQuadForCalc(vao, vertexSize);
/*sst.str(std::string());
sst << "deltaE_texture-scattering_order-" << scatteringOrder << ".ppm";
saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, sst.str(),
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 7. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// line 9 in algorithm 4.1
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummy3DTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _deltaSRayleighTableTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);
_inScatteringSupTermsProgramObject->activate();
if (scatteringOrder == 2)
_inScatteringSupTermsProgramObject->setUniform("first", 1.0f);
else
_inScatteringSupTermsProgramObject->setUniform("first", 0.0f);
_inScatteringSupTermsProgramObject->setUniform("transmittanceTexture", _transmittanceTableTextureUnit);
_inScatteringSupTermsProgramObject->setUniform("deltaJTexture", _deltaJTableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_inScatteringSupTermsProgramObject);
for (int layer = 0; layer < R_SAMPLES; ++layer) {
step3DTexture(_inScatteringSupTermsProgramObject, layer);
renderQuadForCalc(vao, vertexSize);
}
/*sst.str(std::string());
sst << "deltaS_texture-scattering_order-" << scatteringOrder << ".ppm";
saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, sst.str(),
MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 8. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
glEnable(GL_BLEND);
glBlendEquationSeparate(GL_FUNC_ADD, GL_FUNC_ADD);
glBlendFuncSeparate(GL_ONE, GL_ONE, GL_ONE, GL_ONE);
// line 10 in algorithm 4.1
glBindTexture(GL_TEXTURE_2D, _dummyTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F,
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT, 0,
GL_RGB, GL_FLOAT, nullptr);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummyTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _irradianceTableTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);
_deltaEProgramObject->activate();
_deltaEProgramObject->setUniform("line", 10);
_deltaEProgramObject->setUniform("deltaETexture", _deltaETableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_deltaEProgramObject);
renderQuadForCalc(vao, vertexSize);
/*sst.str(std::string());
sst << "irradianceTable_order-" << scatteringOrder << ".ppm";
saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, sst.str(),
DELTA_E_TABLE_WIDTH, DELTA_E_TABLE_HEIGHT);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 9. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// line 11 in algorithm 4.1
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummy3DTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _inScatteringTableTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Computation Framework not built.");
glViewport(0, 0, MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);
_deltaSSupTermsProgramObject->activate();
_deltaSSupTermsProgramObject->setUniform("deltaSTexture", _deltaSRayleighTableTextureUnit);
loadAtmosphereDataIntoShaderProgram(_deltaSSupTermsProgramObject);
for (int layer = 0; layer < R_SAMPLES; ++layer) {
step3DTexture(_deltaSSupTermsProgramObject, layer, false);
renderQuadForCalc(vao, vertexSize);
}
/*sst.str(std::string());
sst << "inscatteringTable_order-" << scatteringOrder << ".ppm";
saveTextureToPPMFile(GL_COLOR_ATTACHMENT1, sst.str(),
MU_S_SAMPLES * NU_SAMPLES, MU_SAMPLES);*/
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error executing computation 10. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
glDisable(GL_BLEND);
}
}
void RenderablePlanet::preCalculateAtmosphereParam() {
//==========================================================
//========= Load Shader Programs for Calculations ==========
//==========================================================
loadComputationPrograms();
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error loading shader programs for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
//==========================================================
//============ Create Textures for Calculations ============
//==========================================================
createComputationTextures();
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error creating textures for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// Preparing FBO...
GLint defaultFBO;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO);
GLuint calcFBO;
glGenFramebuffers(1, &calcFBO);
glBindFramebuffer(GL_FRAMEBUFFER, calcFBO);
glReadBuffer(GL_COLOR_ATTACHMENT1);
//glDrawBuffer(GL_COLOR_ATTACHMENT1);
GLenum drawBuffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
glDrawBuffers(2, drawBuffers);
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errString = gluErrorString(err);
std::stringstream ss;
ss << "Error creating FrameBuffer Object for Atmosphere computation. OpenGL error: " << errString << std::endl;
LERROR(ss.str());
}
// Prepare for rendering/calculations
GLuint calcVAO;
GLuint calcVBO;
createRenderQuad(&calcVAO, &calcVBO, 1.0f);
GLint m_viewport[4];
glGetIntegerv(GL_VIEWPORT, m_viewport);
// Execute Calculations...
LDEBUG("Starting precalculations for scattering effects...");
//==========================================================
//=================== Execute Calculations =================
//==========================================================
executeCalculations(calcVAO, drawBuffers, 6);
deleteUnusedComputationTextures();
glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO);
glViewport(m_viewport[0], m_viewport[1],
m_viewport[2], m_viewport[3]);
glDeleteBuffers(1, &calcVBO);
glDeleteVertexArrays(1, &calcVAO);
glDeleteFramebuffers(1, &calcFBO);
LDEBUG("Ended precalculations for scattering effects...");
}
void RenderablePlanet::createAtmosphereFBO() {
GLint m_viewport[4];
glGetIntegerv(GL_VIEWPORT, m_viewport);
/*GLint defaultFBO;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO); */
_atmosphereTextureUnit.activate();
glGenTextures(1, &_atmosphereTexture);
glBindTexture(GL_TEXTURE_2D, _atmosphereTexture);
//glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, _atmosphereTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_viewport[2],
m_viewport[2], 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
/*glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 8, GL_RGBA,
m_viewport[2], m_viewport[3], true);*/
glGenFramebuffers(1, &_atmosphereFBO);
/*glBindFramebuffer(GL_FRAMEBUFFER, _atmosphereFBO);
glReadBuffer(GL_COLOR_ATTACHMENT1);
GLenum drawBuffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
glDrawBuffers(2, drawBuffers);
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
std::stringstream ss;
ss << "Error creating atmosphere framebuffer. OpenGL error: " << err << std::endl;
LERROR(ss.str());
}
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _dummyTexture, 0);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, _atmosphereTexture, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
LERROR("Atmosphere Framework not built.");
glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO);
glViewport(m_viewport[0], m_viewport[1],
m_viewport[2], m_viewport[3]);*/
}
void RenderablePlanet::createRenderQuad(GLuint * vao, GLuint * vbo, const GLfloat size) {
glGenVertexArrays(1, vao);
glGenBuffers(1, vbo);
glBindVertexArray(*vao);
glBindBuffer(GL_ARRAY_BUFFER, *vbo);
const GLfloat vertex_data[] = {
// x y z w
-size, -size, 0.0f, 1.0f,
size, size, 0.0f, 1.0f,
-size, size, 0.0f, 1.0f,
-size, -size, 0.0f, 1.0f,
size, -size, 0.0f, 1.0f,
size, size, 0.0f, 1.0f
};
glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_data), vertex_data, GL_STATIC_DRAW);
glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 4, reinterpret_cast<void*>(0));
glEnableVertexAttribArray(0);
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
std::stringstream ss;
ss << "Error creating vertexbuffer for computation. OpenGL error: " << err << std::endl;
LERROR(ss.str());
}
}
void RenderablePlanet::renderQuadForCalc(const GLuint vao, const GLsizei size)
{
glBindVertexArray(vao);
glDrawArrays(GL_TRIANGLES, 0, size);
glBindVertexArray(0);
}
void RenderablePlanet::step3DTexture(std::unique_ptr<ghoul::opengl::ProgramObject> & shaderProg,
const int layer, const bool doCalc)
{
// See OpenGL redbook 8th Edition page 556 for Layered Rendering
//if (doCalc)
{
float earth2 = _atmospherePlanetRadius * _atmospherePlanetRadius;
float atm2 = _atmosphereRadius * _atmosphereRadius;
float diff = atm2 - earth2;
float r = static_cast<double>(layer) / static_cast<double>(R_SAMPLES - 1);
float r2 = r * r;
float c = 0.0;
if (layer == 0)
c = 0.01f;
else if (layer == (R_SAMPLES - 1))
c = -0.001f;
else
c = 0.0;
r = sqrtf(earth2 + r2 * diff) + c;
float dmin = _atmosphereRadius - r;
float dmax = sqrtf(r * r - earth2) + sqrtf(diff);
float dminp = r - _atmospherePlanetRadius;
float dmaxp = sqrtf(r * r - earth2);
shaderProg->setUniform("r", r);
shaderProg->setUniform("dhdH", dmin, dmax, dminp, dmaxp);
}
shaderProg->setUniform("layer", static_cast<int>(layer));
}
void RenderablePlanet::saveTextureToPPMFile(const GLenum color_buffer_attachment, const std::string & fileName,
const int width, const int height) const {
std::fstream ppmFile;
ppmFile.open(fileName.c_str(), std::fstream::out);
if (ppmFile.is_open()) {
unsigned char * pixels = new unsigned char[width*height * 3];
for (int t = 0; t < width*height * 3; ++t)
pixels[t] = 255;
// check OpenGL error
GLenum err;
while ((err = glGetError()) != GL_NO_ERROR) {
const GLubyte * errorString = gluErrorString(err);
std::cout << "\n\nBefore Reading Texture from card. OpenGL error: "
<< err << " - " << errorString << std::endl;
}
glReadBuffer(color_buffer_attachment);
glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, pixels);
ppmFile << "P3" << std::endl;
ppmFile << width << " " << height << std::endl;
ppmFile << "255" << std::endl;
std::cout << "\n\nFILE\n\n";
int k = 0;
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
ppmFile << (unsigned int)pixels[k] << " " << (unsigned int)pixels[k + 1] << " " << (unsigned int)pixels[k + 2] << " ";
k += 3;
}
ppmFile << std::endl;
}
delete[] pixels;
ppmFile.close();
}
}
} // namespace openspace
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